[sdiy] Crude sampler chip

[Dave Magnuson]

---- Original Message ----- 
From: "Derek Holzer" <derek at umatic.nl>
To: "Dump Static" <xpandrew at ph.k12.in.us>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, October 10, 2007 4:05 PM
Subject: Re: [sdiy] Crude sampler chip

<SNIP>


> But a more brave soul could look into the digital addressing functions of 
> the chip for cheap, noisy granular synthesis. > -- 

<SNIP>

I have the app notes / design guide for the ISD1xxx family.   According to 
the book, addressing is quite simple:

You can use 8 bit binary address values from 0-159.    Divide the total 
storage time by 160, and this is the length of each step in the address.

With ISD1020A as an example (20 sec) = 125 mSec per step.  Using decimal 
equiv of each address:

address of 0 = 0 sec
address of 1 = .125 s
address of 8 = 1.00 sec
etc.

Seems pretty simple, although I've never tried it.   It says you can start 
playback or recording at any of these points.  The book also mentions 
cascading, looping, etc.  Pretty neat if you can find a copy

Dave Magnuson